Q. The mass equivalent at $931\ MeV$ energy is
A) $1.66 \times 10^{- 27}kg$
B) $6.02 \times 10^{- 24}kg$
C) $1.66 \times 10^{- 20}kg$
D) $6.02 \times 10^{- 27}kg$
Explanation
(a) $m = \frac{E}{c^{2}} = \frac{931 \times 1.6 \times 10^{- 13}}{\left( 3 \times 10^{8} \right)^{2}} = 1.66 \times 10^{- 27}kg$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.